Automatic light signal



NOV. 5, 1935. EHRETS AUTOMATIC LIGHT SIGNAL Filed July 28, 1932 2' Sheets-Sheet 1 fig. 6.

NOV. 5, 1935. J EHRETS 2,019,956

AUTOMATIC LIGHT SIGNAL Filed July 28, 1932 2 Sheets-Sheet 2 Patented Nov. 5, 1935 UNITED STATES PATENT OFFICE 2,019,956 AUTOMATIC LIGHT SIGNAL I Joseph Ehr ets, Coplay, Pa.

Application July 28, 1932, Serial No. 625,510

1 Claim. (or. 177-311) a system of the above-mentioned character which id is simple and durable in construction, reliable and ecient' in operation and inexpensive to manuiacture. J

Other objects and advantages of the invention will be apparent during the course of the followiii 'ing description.

lin the accompanying drawings, forming a part of this specification and in which like numerals are employed to designate like parts throughout the same, 3 Fig. l is a side elevation view of one of the circuit breakers, employed in the system, To Fig. 2is a front elevation view of the circuit :ers,

Fig. 3 is a front view of the signal light, i Fig. ills a vertical sectional view taken on lines M of Fig. 3,

Fig. 5 is a diagram of the electric circuit for lamps having single filaments, and,

Fig.6 is a diagram of the electric circuit for lps having double filaments.

In the drawings, wherein for the purpose of illustration, I have shown a preferred embodiment of. my invention, the numeral 5 denotes a' series oi. electro-magnets mounted on a supporting plate 5 and each of the magnets includes a ill-shaped frame I, acentral core 8 attached to the frame, .an armature 9 extending across the, top of the magnet, supported at one end by the flemble, hinge plate I 0 attached to the side of the frame I, as at H, and the free endof the armature is provided on opposite sides with contacts I2 and i3, adapted to altemately ngage the stationary contacts and I5, supported by the bracket l6 attached to the side of the frame I. A lea! spring I! attached to the plate ill and armature 9, normally holds the contact II of the armature in engagement with the stationary contact l4.

, Referring to Fig. 5, the circuit for a lighting system having single filament lamps consists of a battery l8 which is grounded at I! and has connection with the conventional switch 20, through the wire 2|. One contact of the switch has connection with the terminal 22 by the wire a 23 andthe wire 23 has connection with the coil of one of the magnets, as at it. The opposite 1 end of the coil, through the wire 25 has connection with the terminal 26,- which through the wire H has connection with the tail-light it, which is grounded at 29. The contacts l2 of each armature are. connected in series by the wires 39 and 3!, which in turn are connected to the terminal 22, through the wire 32. The wire 32 has connection with the stationary contact E5, of one magnet, through the wire 33, and the 7 contacts 63 of all the magnets are connected in series by wires 3t and 3t and through wire 36 have connection with the terminal ill, which through wire it hasconnection with the instrument board light 39, grounded as at it. The

other contact of the switch is connected to the terminal it, through the wire ti and the terminal ti, through wire it has connection with the magnet'coils, as at Maud it respectively.

The opposite ends of the coils have connection m with the terminals it and ill, through wires it and t9, and the terminals are respectively connected to the headlights Stand 58, through wires 52 and 53, the headlights each being grounded,

as at M and 55. The stationary contacts it of w,

the magnets are connected in series by M5 and 51 and through wire 58 have connection with terminal 59, which through wire tii has connection with the signal light ti, grounded, as at $2.

. In Fig. 6, a circuit is shown for lighting systems 3g,

using double filament lamps and this circuit is through wires 'I3-and 14.

As more clearly shown in Figs. 3 and 4, the signal light Si is mountedin a socket lidisposed 4.6 within a box-like casing'lfi and mounted over the end of. the casing is a cover plate 11 having a window 18 in the center thereof which iscovered by a glass pane 19; The casing 16 is adapted to be mounted'in the dash-board oi the autobe mobile, where it may be readily seen by the driver.

"In operation, upon closing the switch 20, the current flows through the magnets 5 and circuits leading to the head-lights 50, 5l', tail-light II 55 be de-engerized, thereby breaking the 'circuitf and the armature 9 of the magnet de-engerized, under the action or the spring II, will cause the contact I2 to engage the contact I, thereby completing the circuit to the signal light'fil, which will indicate to the driver of the automobile that one of the lights has gone out. It for any reason the signal light was also burned out, the driver would know of the defect in the other lights, by reason of the instrument board light 39, going out each time there is a defect in any of the other lights. When the defective light invention herewith shown and described is to be takenas a preferred example 011 the same and that certain changes in the shape, size and arrangement of the parts may be made without departing from the spirit of the invention or the scope of the subjoined claim;

Having thus described my invention, I claim:-- A warning signal system for detectiye headlights comprising in combination with separate head and tail lights arranged in independent circuits, an electro-magnet interposed in each of the circuits of said lights, armatures for each of said magnets, a signal having an independent circuit, a plurality of circuit closers interposed in said signal circuit, each including a stationary back side of said armatures, said stationary and movable contacts being connected in parallel, whereby said signal circuit is closed upon deenergizing of any of said magnets, a light having contact and a 'movable contact carried on the 10 an independent circuit, a plurality of circuit 1 breakers interposed in said light circuit, each including a stationary" contact and a movable contact carried by the front side of said armatures, said stationary and movable contacts of said circuit breakers being connected in series, whereby said circuit is opened when any oi said magnets are de-energized and a common source of current for said circuits. v I

JOSEPH EHRETB. 

